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dkim=none (message not signed) header.d=none;nxp.com; dmarc=none action=none header.from=oss.nxp.com; Received: from DB6PR0402MB2760.eurprd04.prod.outlook.com (2603:10a6:4:a1::14) by DB6PR04MB3015.eurprd04.prod.outlook.com (2603:10a6:6:11::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4150.27; Tue, 25 May 2021 09:05:28 +0000 Received: from DB6PR0402MB2760.eurprd04.prod.outlook.com ([fe80::45b9:c993:87ec:9a64]) by DB6PR0402MB2760.eurprd04.prod.outlook.com ([fe80::45b9:c993:87ec:9a64%8]) with mapi id 15.20.4150.027; Tue, 25 May 2021 09:05:28 +0000 Subject: Re: [PATCH V6 0/4] soc: imx: add i.MX BLK-CTL support To: Adam Ford Cc: Rob Herring , Shawn Guo , Sascha Hauer , Sascha Hauer , Fabio Estevam , NXP Linux Team , Philipp Zabel , Lucas Stach , Krzysztof Kozlowski , =?UTF-8?Q?Guido_G=c3=bcnther?= , Marek Vasut , Andrey Smirnov , devicetree , arm-soc , Linux Kernel Mailing List , Jacky Bai , Schrempf Frieder , Abel Vesa , Peng Fan References: <20210522134249.15322-1-peng.fan@oss.nxp.com> From: "Peng Fan (OSS)" Message-ID: <7f6bf036-1956-5d68-987e-d89de570056a@oss.nxp.com> Date: Tue, 25 May 2021 17:05:13 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; 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charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 2021/5/25 3:29, Adam Ford wrote: > On Sat, May 22, 2021 at 8:10 AM Peng Fan (OSS) wrote: >> >> From: Peng Fan >> >> V6: >> Thanks for Adam's report on V5. >> Resolve the error message dump, it is the child device reuse >> the parent device node and matches the parent driver. >> Filled the remove function for child device. >> A diff dts file for upstream: >> https://gist.github.com/MrVan/d73888d8273c43ea4a3b28fa668ca1d0 > > Since Shawn has merged the pgc portion [1], can you post the device > tree to the mailing list, so he can pull that in too? Without the DT, > the PGC's won't do anything. > If you want me to do it, can I do it, but you've done all the work. Some PGC node will take blk-ctl as parent power domain, such as VPU-G2/G1/H1 and PGC MIPI, so need to wait blk-ctl patchset merged. The blk-ctl patchset, I think it should be the final one. I 'll post the dts patch soon. Thanks, Peng. > > [1] - https://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux.git/log/?h=for-next > > thanks > > adam > >> >> V5: >> Rework the blk-ctl driver to let sub-PGC use blk-ctl as parent power >> domain to fix the potential handshake issue. >> I still keep R-b/A-b tag for Patch 1,2,4, since very minor changes >> I only drop R-b tag for Patch 3, since it has big change. >> An example, the pgc_mipi not take pgc_dispmix as parent: >> >> pgc_dispmix: power-domain@10 { >> #power-domain-cells = <0>; >> reg = ; >> clocks = <&clk IMX8MM_CLK_DISP_ROOT>, >> <&clk IMX8MM_CLK_DISP_AXI_ROOT>, >> <&clk IMX8MM_CLK_DISP_APB_ROOT>; >> }; >> >> pgc_mipi: power-domain@11 { >> #power-domain-cells = <0>; >> reg = ; >> power-domains = <&dispmix_blk_ctl IMX8MM_BLK_CTL_PD_DISPMIX_BUS>; >> }; >> >> dispmix_blk_ctl: clock-controller@32e28000 { >> compatible = "fsl,imx8mm-dispmix-blk-ctl", "syscon"; >> reg = <0x32e28000 0x100>; >> #power-domain-cells = <1>; >> power-domains = <&pgc_dispmix>, <&pgc_mipi>; >> power-domain-names = "dispmix", "mipi"; >> clocks = <&clk IMX8MM_CLK_DISP_ROOT>, <&clk IMX8MM_CLK_DISP_AXI_ROOT>, >> <&clk IMX8MM_CLK_DISP_APB_ROOT>; >> }; >> >> V4: >> Add R-b tag >> Typo fix >> Update the power domain macro names Per Abel and Frieder >> >> V3: >> Add explaination for not listing items in patch 2 commit log Per Rob. >> Addressed comments from Lucas and Frieder on patch [3,4]. >> A few comments from Jacky was ignored, because following gpcv2 >> coding style. >> >> V2: >> Fix yaml check failure. >> >> Previously there is an effort from Abel that take BLK-CTL as clock >> provider, but it turns out that there is A/B lock issue and we are >> not able resolve that. >> >> Per discuss with Lucas and Jacky, we made an agreement that take BLK-CTL >> as a power domain provider and use GPC's domain as parent, the consumer >> node take BLK-CTL as power domain input. >> >> This patchset has been tested on i.MX8MM EVK board, but one hack >> is not included in the patchset is that the DISPMIX BLK-CTL >> MIPI_M/S_RESET not implemented. Per Lucas, we will finally have a MIPI >> DPHY driver, so fine to leave it. >> >> Thanks for Lucas's suggestion, Frieder Schrempf for collecting >> all the patches, Abel's previous BLK-CTL work, Jacky Bai on help >> debug issues. >> >> >> Peng Fan (4): >> dt-bindings: power: Add defines for i.MX8MM BLK-CTL power domains >> Documentation: bindings: clk: Add bindings for i.MX BLK_CTL >> soc: imx: Add generic blk-ctl driver >> soc: imx: Add blk-ctl driver for i.MX8MM >> >> .../bindings/soc/imx/fsl,imx-blk-ctl.yaml | 66 ++++ >> drivers/soc/imx/Makefile | 2 +- >> drivers/soc/imx/blk-ctl-imx8mm.c | 139 ++++++++ >> drivers/soc/imx/blk-ctl.c | 334 ++++++++++++++++++ >> drivers/soc/imx/blk-ctl.h | 85 +++++ >> include/dt-bindings/power/imx8mm-power.h | 13 + >> 6 files changed, 638 insertions(+), 1 deletion(-) >> create mode 100644 Documentation/devicetree/bindings/soc/imx/fsl,imx-blk-ctl.yaml >> create mode 100644 drivers/soc/imx/blk-ctl-imx8mm.c >> create mode 100644 drivers/soc/imx/blk-ctl.c >> create mode 100644 drivers/soc/imx/blk-ctl.h >> >> -- >> 2.30.0 >> _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel